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Q.

Jet planes and rockets work on the principle of conservation of


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a

Energy

b

Mass

c

Momentum

d

Heat 

answer is C.

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Detailed Solution

Jet planes and rockets work on the principle of conservation of momentum.
The concept of momentum conservation governs rocket operation. Rocket ejects gases in a backward direction, which gives the gases momentum in that direction. Because momentum cannot be lost, the rocket gains momentum in a forward direction and moves ahead. As a result, the rocket operates according to the conservation of linear momentum.
 
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